Instrument Control Toolbox Release Notes

VISA Driver Limitations

Agilent Technologies

The Agilent VISA driver has these known limitations:

• Asynchronous read and write operations for GPIB, GPIB-VXI and VXI VISA objects are not supported. Therefore, the following toolbox functionality is not supported for these objects:
• The readasync function
• The async flag for the fprintf and fwrite functions
• The BytesAvailableAction and OutputEmptyAction properties
• All eight bits are used for the EOS comparison. Therefore, the only value supported by the CompareBits property is 8.

National Instruments

The National Instruments VISA driver uses all eight bits for the EOS comparison. Therefore, the only value supported by the CompareBits property is 8.

GPIB Driver Limitations

Known Software Problems